Learn all of these prepositions at one sitting as a single
sentence! Just say them like this.
You're saying: "aus, bei, gegenüber, mit, nach,
seit, von, zu."

RECOMMENDED
READING

Dative
Prepositions

The DATIVE PREPOSITIONS
are always followed by the dative case. The best way to
deal with these is to simply follow the same format you
used for the accusative prepositions: *(prep)
dem, (prep) der, (prep) dem, (prep) den. These still follow
the order of masculine, feminine, neuter, and plural.

Once you realize that a noun is masculine,
you'll be ready to respond with a "dem" after
these prepositions - after just having practiced as you've
been practicing. The same will occur for feminine and neuter.

This should be making sense by now, and
will actually become easier very quickly. Every time you
practice these concepts, you internalize more of what it's
like to "be" German!